IExecutorService service = client.getExecutorService(randomString());
final CountDownLatch responseLatch = new CountDownLatch(CLUSTER_SIZE);
final CountDownLatch completeLatch = new CountDownLatch(CLUSTER_SIZE);
final String msg = randomString();
Callable<String> callable = new AppendCallable(msg);
Collection<Member> collection = server.getCluster().getMembers();
service.submitToMembers(callable, collection, new MultiExecutionCallback() {
public void onResponse(Member member, Object value) {
if (value.equals(msg + AppendCallable.APPENDAGE)) {